Pump



Jly24, 1928.

1,618,556 E. D. COPSON PUMP ` Filed June 15, 1927 a ERNEST D. CoPSoN @5% tiozmag/o www ratified July 24, 192s.

.UMTED 4-PATl-lNiT]- GFFICE.

. ll!!lllll'EST Il). COPSON, OF LIWOOD, ENNSYLVANIA, ASSI-GNORfTD TE VISCOSE COH- rAnY, or MARCUS noox, PENNSYLVANIA, A ooaronA'rIoN or PENNSYLVANIA rum. t

' Application v:tiledJune 15, 1927. Serial No. 199,056.

y invention relates to pumps, and particularly to a pump for viscous liquids, such as viscose. The type of pump with which my invention deals is illustra-ted in the patent to Topham No. 1,480,425, and the object of 'my invention is to improve the const-ruction of the latter to avoid certain weaknesses and defects inherent in that construction.

In the accompanying drawings- Fi 1 is a vertical section through a pump in w 4ich myinvention is embodied in one form; l

Fig. 2' is a section on the line 2-2, Fig. 1;

plan View ofthe rotary piston ment of the pump. By providing a rigid piston rod and establishing an appropriate sliding connection between the piston and its` rotary drive head, this difficulty is overcome. Certain other features of construction are also improved.

The pump comprises a. stationary hollow casing 15, from one lend of which projects the drive stem 16 of a rotary block 17 which tits vsnugly within the chamber of the casing 15. The block 17 is provided with a plurality of piston bores 18 parallel with the axis of the block and having at one end lateral openings 19 which register with arcuate channels 20 and 21 formed in the inner face of .the wall of casing 15. Through the latter an inlet passage 22 opens to they channel 20, and a discharge passage 23 opens to the channel 21. Suitable connections are made on one hand to the passage 22 from a source of supply for the liquid to be pumped,

for example viscose, and on the other hand to the assage 23 for the discharge of the Iliquid t rough a suitable conduit to a spinning| nozzle of any appropriate type, as is well understood in the art.

'Extending into the severalbores 18 .in rotary block 17 are solid plunger pistons 24,

the outerends of which are provided with ball heads 25 by-whi'ch an actuating engage-` ment with therotary piston drive head 26 is on the relative play ot these 'parts during the l drive of the pump.

A central cupped recess 29 in the drive head 26 receives a bearing ball 30, against which rests the thrust block 31E received --in an axial r'ecess 32 in the rotary block 1.7.1vv

A spring 33 is engaged under stress between the bearing block 31 and the bottom of the recess 32 land serves not only to seat the block 17 against one end of the chamber of casing 15, but also to press the drive head 26 against the cam faced bearing plate 34 at the opposite end of the casing. To reduce wear I preferably provide the thrust block 31 with an inset 35 of s ecially hardened metal which rests upon the ball 30.

The plate 34 is provided on its inner face with a cam surface 36 inclined to the axis of the pump. A bearing flange 37 on the plate engages the periphery of the drive head 26, while a central hub 38 on the latter enters the bearin -recess 39 formed in the cam face 36. he margin ot' the plate 34 is provided With arcuate slots 40 for the reception of screws 41 by which the plate is attached Ito the pump casing 15. The slots 40 permit the rotary'adjustment of the plate 34 to time the'strokes of the pistons 24, and thus properly vrelate their operation to the intake and discharge channels 20 and 21 in tle stationary casing 15.

The operation of the pump will be readily understood. When the block 17 is rotated by power applied in any suitable fashion to its stem 16 (for example through gear 42 fast thereon), the pistons 24 arranged in the bores 18 of the block lare carried around therewith. The ball ends25 ofthe pistons,

severall engaging the piston drive headl 26, cause the latter to rotate simultaneously. Inasmuch as the head 26 rotates on an axis inclined to the axis of the block 17, the pistons are reciprocated, drawing fluid lnto their respective bores 18successively from the inlet port 22 and channel 2O during portion of the revolutionof the block 17, and forcing the liquid from 'the bores to the channel 21 and .delivery port 23 durin a ball ends 25 in the slots 27 of the drive head 26, takes care of the radial play between these parts incident to their revolution on axes inclined to each other. The undercut slideways 27 in the head 26 establish snug engagement with the ball ends 25 at `all times, and insure smooth operation of the pump. rl`he construction is rugged, serviceable, and free from danger of breakage;

l have indicated at 43 an opening through the casing l5 from delivery channel 2l. T his opening ai'ords a connection on the delivery side of the pump to a pressure chamber (not shown) which serves to maintain a constant delivery pressure en the luid, although the pump pistons have ari Yintermittent action. tien. does not enter into my invention.`

l .Modifications details of construction will readily occur to those skilledin the art which do not depart from the thoughts which underlie what I claim as my invention.-

I claim- In a `pump of the type described, a hollow casing, a cam plate forming a closure .for one end of the casing, a driven rotary cent face of t 1e bleek, ysaid plunger having a hard metal inset engaging the bearing ball. ln testimony whereof 1l have signed my name to this specification.

riihis feature of the construcy Y ERNEST D. COPSON. 

